I purchase the 2 100 watt panel kit from Windy Nation 2 years ago for around $350 ish. I did the portable deal for a couple trips as I thought I need to due to shade and everything else guys post on this forum. 2 springs ago I mounted the 2 panels on my roof, ran the wires and hooked the system up.
The two panels keep my 2 group 24 battery charged up just fine, the last few trips out we have taken our 4 month old grandson so I have set the heater on 60 at night as the temps were getting down to the 40's. By noon my battery's have always been charged back up. Only time I find I need to run my generator is in the fall while hunting as the temps are in the 20's so the heater is running a lot and most times it's cloudy and of course the sun is at a low angle.